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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0716850951608e9f0717ec9e4a001c93d847bae0614e35df26e42be484a5ec7c' 
  AND token = 'dSuF72P59cuP0sfYBYHcPOOVO1tQDmN0AduXU9iwR4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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