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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07a92c7feb1c90b7493e14d5073ca715fd96be6c0003b90e05fa1ffc4d674295' 
  AND token = 'vy6lvo8MnVSXOlcD8oECTFu80rEhqBplmz0Pd9oz5vY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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