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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e79011a2c6d3a6705b4b37b314cf04bb36c51822792db4f580ce6d4cfd1220f' 
  AND token = 'ZHVObt1lnakCs3sEVnqXTD1K5femj8wTfRr0OpLrZ90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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