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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c478d368b67d04ed42cec73c7e24f8ce28d514bec081ec8c75b5eda93ca1ca8' 
  AND token = 'pFoUsWY3hVVbb+69UjG1P56v7243htrdIy9Xl+im+Kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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