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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3fac381c8c9324368daf026411b7730c0ec52ca0d2f333930053fe7df9f066e' 
  AND token = '5ohFSHGU/fRfeQjIQIVPh7UFpLa2RlRYaMDlRjwmGgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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