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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba47a72724e5876cf07b6974b06bb58d8a962176288a74e60e4dfd1556c655da' 
  AND token = '22eWhtoz8LoGl2VIhMGQwtO1deV8aHJfNf5ig4pvHGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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