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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca36ef16bd60de1c88b385b179c16ddfb56dec280659ab410658794153d407d3' 
  AND token = 'I/R8fEoBNtbXoel3pxuZLycWL40H1TjddkJm+ZzsocM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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