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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3c144f03cc876a367a25d0ab7a8de18aa3e440912bf81bb3ecaa06553e96fd4' 
  AND token = 'dsi14CsW5JqhUV/lqeEcenD7YdJR+h3vBcqV4GSGNes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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