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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8922c39884cc2e1c6635f309d9f4a7ecd8a8e111f613c0986d44712b10f713a8' 
  AND token = '94TYr+63znOzKZyAsSq1FVb10odxyDxVAzhLB3zhU3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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