Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'baaca6d933cc9c9c48a891c128446ad7a2496e503d94ca29fadf27781bb20421' 
  AND token = 'qFspA8k03RelclvMpfNkaeRGpNcAFmzZm2PyksLhADg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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