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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ced10bd7dc5d64a1eecb597ce7658bc09e444f0ce201949785b9f2f7a1aa54e' 
  AND token = 'HPrcbF4Ydvo7ZNzjtM1NPwLPSbVTpA7HSV+fZS0p41g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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