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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2660cca6ddad7b30aa4ad41326234e59fbe129b8f129b20aaf54e0226dda3725' 
  AND token = 'va0S7Mav3RvJkA2hwcrHppBZr1Gm/V6maDnA0J/bE2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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