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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3df622ac23a2f5a7ad8d173ddf5bdf0bf4cb7ddad5541bbba0262862b82c56e6' 
  AND token = 'DnJMFlZsODTzcwdbGokk97KdOBzKBPw7PTA7IjCsK9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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