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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f922a624d38f7eb109445625c8b4580d38b7a1071c4ff3e7ce490d85e1e288e1' 
  AND token = 'AE1e/gqJUhLbjFb0DKB0cN9pZoDsru4M6dHId8PB/oM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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