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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b603bf97f37b2cdc6db1c8cb5d4166f656c2e9a76e2b9576812a634f8b119884' 
  AND token = 'nNYId9qcJHnY3fnuRBdAT3YmEcwtjuoYpU4f6kWXJG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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