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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '484b9dddb17c753bfb394ffd777464c8730481099b8bf63ab6abaaf19232b029' 
  AND token = '9fsHtjnRET6AIZL+ykHZ/2dMery52H4f/6El/Y3yAeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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