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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a0e21fd4be5424328b8bbcf81b48a87a80b55a1a06800331e6f2effd32c8e89' 
  AND token = 'GAimAErGDwNZBQFZR2eGwhYnm38st36ZagAXXEHsN88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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