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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e863052780f6165897ec87e93ebc260d9f95e48359be6d300b2ca0d137ce1a78' 
  AND token = 'KSRGk/Sfa4+eMVKWoR1ySK7vkosT+EyPGlruLu3SuPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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