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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2145ac7fbc7186f7617d659ed84b6f8b2164b14951178e5b704a07dacffe060' 
  AND token = 'yV2eHp0gTFy9RbFfWe3z8M86a6ctSwloiPctYsYpbxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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