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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9e1edadf984f9a487522c3993d606aa6eb3845895486173bf8fe0d6599c1d76' 
  AND token = 'bKGp9OAMs1Iym9bcVFmaTM0Y0IJ/r8DzWj1rANl8sF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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