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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd22ca8a9a5f037c64399b0cf85e0f827502c57ae30f2e2c58e118e0835f011d2' 
  AND token = '3O2Tr6S56mXOFYe1L8xikXnrHeSSWEBhuZJhQaGRy4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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