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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d24bc009478ac15535381f2071e737d705bb1f32a30a92976e742c877b4bdc4' 
  AND token = 'x4eXuV+LSWMeOJ41Cmk+JA7UNGo443MPenEMduQe5bY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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