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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adca05bb6c4cfae390d4a700294d060cfb1c4c941f4ccaf8bf24acc3f16011d5' 
  AND token = 'ObaSD2J7f1HygGENzAB0Vtnau8oTQ4zYNI8IeouyJKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}