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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61727708321daa39c0a945e238b7e99a00a5eed36be13a660aed822adbff79f4' 
  AND token = 'L2s6o62PNHA1B+yRgokOr6iIXcEAi3rr3d3yt1XENP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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