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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1945b4404df9dc6379daefcf2530c4a837a8ce3626e3155c72ecd4d545a1bd7' 
  AND token = 'qECLvxODsqbZQ5TnpYU71O8LOT4NJTnfs06wDjI0OZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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