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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11c3606981749f1bfc430df35969cc43ee57262cc6d0dd7fb1c0d765d9462c5b' 
  AND token = 'efdopA2BCc60kOHjY8PuqIeJOLw6P3tChHR5/51AVn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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