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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72f60034a82324177a2db7ab1127c9873b294339957454ed3eebcada6b461d6e' 
  AND token = 'Vj+vJ8rJA5M30WCH45l1hR0uDYL8L4tDI9XiXMyTiyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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