SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3af68037286825777bfa02f5d8566d140c23c69dc27b66665d3b85d94a6b7d4d' 
  AND token = 'Qg6FFqzUgbmSVwUQgl3p8y4sWM1+PAJBA9zZANJ9d5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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