SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fad9f25afa4c847652786175b73e249cdcc36b0fe5b605433a9fddf6863e4006' 
  AND token = 'Y9SHzxFgnm7qXZjW/M+QC8YjAYbq1klDSu3nl5JyRPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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