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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62cb809aebeaf7452b4607487c986a48f773cec8b72ae3d5fa769447ed888eba' 
  AND token = 'BnY1yMy9x9990V2/TyWMFNeN9LGeIGlHTS40psQaJzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00169

JSON explain

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