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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd039c8ac1e95f9d5ff5d1b76b95d0d5ee14771ab71270a713d85b1f6ebbfd9e8' 
  AND token = 'Yruvc/4VSqdX6zuTze1fyywZsEtrzI+AEhdutDokQ6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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