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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e025660a6dc871fb4336857874f5a6c8fba8ea6bcf9133ca92f8aa26a30eb33e' 
  AND token = 'LFjChuPtaworNoz/lZDULJnO9n90aZ0ZiyLldTISIYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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