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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9b02b52d600ed33e71c3a06e48e83225b97bc2c5f18e6df4b6cb1bde88c183a' 
  AND token = '60hK2go4/2w/wt5pU+0Pe1KQpU7Ch+N4TiOYv3TMo3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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