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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9fb8828f4530ac210d111f1dc3086ad4cec24adaa1f09b80508de85d8a98ad2' 
  AND token = 'KztcQSuqiUq51kO6SBm4SKfM8p9JLx/S2/S6flPKOoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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