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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca9206abbd22ee208070afb98bdf5ccb4d2ff6ac1ee3724860b75e62a38f0b5f' 
  AND token = 'E0oid9b2Eey7OkbpQ+Vbxa4bwJYIRz4twzCemEOvxvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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