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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eebe2607db57da552941ce34b42704187df58fc85540d1d9fd3d8cae243f9e0' 
  AND token = 'nF1v8lg9iFUOh3EgrD5gH04Po1Gg8kaygI2TdSb4LIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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