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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee43af56161cc88b34efe1de10a928031b67d4cc40adbd02c17e4ee2ba89d2dc' 
  AND token = 'sQ7VBUU9aVCU/+oIVYy6u6D/0n1YJMHPdvtRHPDyWy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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