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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02395bb52a655d077342b567010c261bf0d1e0dd208372993255da7380e43332' 
  AND token = 'Ficb65SLC/DUzd1fVP2kWMhsh0LAjo6uiJmPMeAWk1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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