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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '432c91526dd04515207a3161f46d67bb10b8ec12951f67c92d443ccd6f9fb0a9' 
  AND token = '36TzzHlMAdJlTTm2oR4NNzZtXj/X47O+CLPp4xub2bo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00089

JSON explain

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