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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ec0e3412720989689c4b0f9a0a234cf18ac174cad327f44a3a7dddf40ae7a65' 
  AND token = 'IngcMugi0sIrNTW78fMQ8eprRhFLY1OKWYBt5IL7KFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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