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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '714224ca5602cd17f95ace7d5a934e4614e59702e52801cd7816a9fc945864a6' 
  AND token = 'fL26SL4MoMJ25rb6uwaBWwk5x+aUYq3/Bv/rVlg8FDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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