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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5b37aaac9e51d05904898710f1aa8e27be2ce3a530e8accc71e496863e5a616' 
  AND token = 'pZocxNVmamOkb7Y3n6H9brMnp+/OcezMU12xbJ+vMcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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