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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c4cb9d1c081e38544116e8c04e8d037f84ed9e6c53a77eb9645dd2a72eb1bd7a' 
  AND token = 'PYC7Tr3mbPgynNIhk4K4T0byKG7Jrcs5hVKNWRZ2nxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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