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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61fe80da2e7013ed60c7bb7d2ab27a4324d5a39faa84bb667292f83a518bc8ec' 
  AND token = 'VlVOAWBazael77WRsLTX8wszWBNe/iIbX6H6GYPypsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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