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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f4a0fc381be3f59de3736d0d1d8d1c21f29821314d2531ec466544a071ef0a7' 
  AND token = 'vbgQg8ODihxgux5//RGT5vhploiyarAYboelF5cnoh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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