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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2c5e1f1d426eecf17f98bba11f9ea9746e2fc550e976517845985681f9c291c' 
  AND token = 'JoZl24a4rV/rqT1m9DTrjq7g0C3RnBau+daHYzHMtMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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