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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b02553bdd766725f4682bd42cd437a797bf4dffb803d3462aa80862201a46161' 
  AND token = 'TvIezcuT+jzd05pPq1yZkMZk7ObSsiCNGp+KwIwoTeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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