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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb692738ef9483789c2a669425aefdd179cfb692783f95e39c26dd297cd808eb' 
  AND token = 'rrd1C6mJbvQg8twbvcp4LxHmTtDsBQOuA7TutQ3VBdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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