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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cc27d58f66278c67f2f0af6b7fa10087c65f6fe6c47d465e5754c96a9d1d3bd' 
  AND token = 'G1ouTJul3K+cu+NgoouiOd5hvhisfLO+YfapClZZNa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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