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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91df4f7ab000ed728320239e79fe42c342203fbdf4ab650533d2a1b5c0465929' 
  AND token = 'YtmeqghzZc1lnr0ST6QisItFM3WlXUQpX7E1c2Sv7Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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