SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aa3a62a616b973a33b66b0f4835dd76d2a714704b53b9716893761aa77a438b' 
  AND token = 'YZb+WCCnTISh2nqq/ZSHbJWx2yWP9h3QzKQm/jmdUFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}