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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d613f070aaeefae807e1a19627a1e09d923bb3b0e8c35855fdae7d82a9741c7' 
  AND token = 'FdhfCoVikn26btfyvwtig8QguHA/wtuoHLW1absHris=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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