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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9586dd2c3981fc97598da5a3dd6311e0c33a8277854d9f8729b96296bb11e0cd' 
  AND token = 'G0eRuOByVDxDb2hD87klPIeQOhb2P3qxZXcCaCnLiew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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