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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fe29f389269dc46cfaa7cf85efe6764075bf9b96ec202e782457b090b2be814' 
  AND token = 'ldT4W0yXZKgCNXvAAEOwHYdufe3NpT1bFKym1OqpHTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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