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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72f0c8c6069548a0ad7bc81c946c9e40133b93e217d38744826ca141c403ecdf' 
  AND token = 'ufoN9KeeroTYWGoUzuoJjl0pW4fL1P9ZR36M3f6c67s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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