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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '695efe084b9760571498b8eefad791623a4638397eef38c8d77fe8ffdb2cd966' 
  AND token = 'VBhft4G1fB4L4q8PZhZUI/I/ZkfsuA1ny1r9DelBXVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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