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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '552212797c884dc9d155032a0cbcd588cf2627f5c69429a43c6138c15ea80c6f' 
  AND token = 'Q+BJdPSYPDPeSYbEd4o69bC+eDloacg/ACr9kyfYLHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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