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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45059d2ae827f4ad8e31b84ae0261c14f33859ef88f37de5458715855cf8271d' 
  AND token = 'Syqa1gqjSOx0LiiRHJXQMIHnO/W1KuCTcgZwVSGWTMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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