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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05e8e73ec111960d9a6e503874cda4eacf4ec230515405dda75b8e35f0414672' 
  AND token = 'G/t6bGZ/dayPm2pTePf1DtdfoqjX9yj2sv48L8AxEfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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