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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d9295fecb85ab9c88805445ae9d148ca5e249a5e7497ee37731c8a2df28ab2f' 
  AND token = 'FM8QGCda6QzWgmASxU9RREbavgN+WZsH0ansoPLFptM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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