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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34b79316ede1a7ead930ddbc5f3091eb928c37dfec28e65e563128be81c83b19' 
  AND token = '1x7RL4d457a0KocXwbO9qQ8bePwVbjlk29YeJ9VkvpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}