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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '033b6957de558572464400f6d371775a394e29bd3ea295d9120e4512dd3a809d' 
  AND token = 'd3D65IWeO8ve8NfYSKV1KWnummE9Cvq3GGEn/C20Xp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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