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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be23432f86a6580d514e1cab1abe7a7afa9bf4ccb2ce57e9c7a55d5a19275124' 
  AND token = 'aa12wwvv9DdirZ4q7ZGBpQuZEmGLLo+ZLT69oOYeiyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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