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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd06e1e379f9190b744484dcc63c88c784c3fdaa9facf0d10b8a479ae693e7016' 
  AND token = 'K3W/6g1gNr+vXX8M5dPXGnquZJZyKyViKfPEX8e5NZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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